You mentioned visual clutter, and then your first bullet point was about too much spacing. Clutter--according to the OS X dictionary you cited earlier--refers to a jumble or tangle of items, implying that they are close together. That's the discrepancy he was referring to.
His posts were completely non-hostile, so aren't you overreacting?
No hostility meant by "you argue". You provided a critique, an argument. I'd open the dictionary... ;)